package demo1;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

public class CardList {
    private static  final String[] SUITS={"♣","♦","♥","♠"};

    public static List<Card> buyCard(){
        List<Card> list=new ArrayList<>();
        for (int i = 0; i < SUITS.length; i++) {
            for (int j = 1; j <= 13; j++) {
                Card card=new Card(SUITS[i],j);
                list.add(card);
            }
        }
        return list;
    }
    public static void shuffle(List<Card> list){
        Random random =new Random();
        for (int i = list.size()-1; i >0 ; i--) {
            int index= random.nextInt(i);
            swap(list,i,index);
        }
    }
    public static void swap(List<Card> list,int i,int j){
        Card tmp=list.get(i);
        list.set(i,list.get(j));
        list.set(j,tmp);
    }


    public static void main(String[] args) {
        List<Card> list=buyCard();
        System.out.println("洗牌前");
        System.out.println(list);
        System.out.println("洗牌后");
        shuffle(list);
        System.out.println(list);
        System.out.println("发牌");

        List<List<Card>> hand=new ArrayList<>();
        List<Card>hand1=new ArrayList<>();
        List<Card>hand2=new ArrayList<>();
        List<Card>hand3=new ArrayList<>();
        hand.add(hand1);
        hand.add(hand2);
        hand.add(hand3);

        for (int i = 0; i < 17; i++) {
            for (int j = 0; j < 3; j++) {
                Card card=list.remove(0);
                hand.get(j).add(card);
            }
        }
        System.out.println("第1个人的牌: "+ hand.get(0));
        System.out.println("第2个人的牌: "+ hand.get(1));
        System.out.println("第3个人的牌: "+ hand.get(2));
        System.out.println("剩下的牌"+list);
    }
}
